Freight-cab-doob lock



JD F. MURPHY.

FREIGHT CAR DOOR LOCK.

, APPucATlou men OCT. 7. 1920 gamma June 14, 1921. fig 4 JOHN F. MURTHY, OF TOLEDO, OHIO.

FREIGHT-CAR-DOOR LOCK.

Specification of Letters Iatent.

Patented June 14, 1921.

Application filed October 7, 1920. Serial No. 415,253.

To all whom it may concern Be it known that ,1, JOHN F. MURPHY, a citizen of the United States, and a resident of Toledo, in the county of Lucas and State of Ohio, have made an Invention Appertaining to Freight-Car-Door Locks; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the characters of reference marked thereon, which form apart of this specification.

My invention has for its object to provide a freight car door lock which 'is so con structed that it will operate as a block to prevent the opening of the door by forward or rearward jarring of the car that may be caused by sudden stopping or starting of the trains, of which the car having my invention, may form a part. It is now the common practice to nail a block of wood on the car and against the edge of the door to prevent the door from sliding open after the car has been loaded. When the car reaches its destination the block is pried or knocked off in order that the door may be opened. Since the blocks are repeatedly nailed on and ripped off in the use of the car, the car is soon damaged by the operation. By my invention I provide a permanently attached means whereby the doors of cars maybe easily blocked. While the means may be easily manipulated to block the car doors, yet it is so constructed that it can not be easily manipulated to open the car unless the car is located at a to be unloaded.

The invention also provides in combination with a means for blocking car doors, a means whereby the door may be sealed in its locked position.

The construction containing the invention may be applied to opposite sides of the car and may be, in case of double doors or in case a single door may he slid in either direction, to open the door, applied to opposite edges of the double or single door.

The invention may be contained in structures of different forms and may be used for different purposes. To illustrate a practical application of the invention I have selected a construction containing the inveni n and shall describe it hereinafter. The

platform in position construction selected is illustrated in the accompanying drawings.

Figure l of the drawings illustrates a side broken view of a car to which my invention is applied. Fig. 2 is a top view of the structure containing my invention and shows a part of the car in section. Fig. 3 is a front view of the structure shown in Fig. 2, showing the cover or face plate broken away. Fig. 4 is a vertical sectional view of the structure containing my invention. Fig. 5 is a sectional view showing the lock in locking or blocking position. Fig. 6 is a sectional view taken on the line 66 indicated in Fig. 5.

l, in Figs. 1 and 6, indicates the car body having the door 2. 3 isthe lock embody ing my invention.

The lock 3 is. placed at the side edge of the door so as to block the door when the lock is in locking position. It is preferably located in part in a recess or cut 4 formed in the larger of the longitudinal car beams 5 and thus effectually blocks the door, inasmuch as the lock abuts the car beam 5. This beam is located well above the flooring of the car and thus the lock is so located that it cannot be readily manipulated by one standing on the ground or reaching from above, from the top of the car. It however is so located thatit can be readily operated by one located on a loading or an unloading platform. The lock 18 located in the out 1 and next to the upri ht beam 6 of the car and so as to extend over or to one side of the tie rod 7 usually found in freight cars at this point. The lock, therefore, abuts the beam 5 on one side and the upright 6 on the other.

The lock 3 has a shell 8 and a face plate 9. The two are securely bolted in place by .the bolts 10 secured by nuts located on the inside of the car. The shell 8 has an in verted T-shaped recess in which is located a T-shaped blocking member 11 and the face plate 9 has an oblong vertical opening 12 that is closed by the sliding cover plate 18 located between the shell 8 and the face plate 9. The ends of the cover plate 13 are provided with the flanges or lugs 14. and 15, one located above the upper edge of the face plate and the other in the opening 12. Movements of the cover plate are thus limited by the flanges or lugs.

The opening 12 is so formed as to permit the blocking member 11 to swing outward to a position, perpendicular to the side of the car and the path of the sliding car door when the plate 13 is lifted. The plate 13 may be dropped on to the blocking memher which will operate in a measure to keep the blocking member in its blocking position. If desired, the face plate 9 may be provided with a lug 16 and the lugs 15 and 16 may be provided with slots through which may be inserted a freight car sealing strip 17 and sealed by the seal 18 and thus the door may be ofiicially sealed or locked by locking the plate in such a position that the blocking member 11 cannot be raised without ripping or breaking the seal.

The blocking member 11 is provided with a square head or enlarged portion having the shoulders 19 and the cover plate 9 has the shoulders 20 located on each side of the opening 12. The blocking member 11 has one end 21 beveled and the shell 8 has a flange 22 that extends a short distance into the shell 8. The flange 22 operates to push the lower end of the member 11, when it, or a substantial part of it, has passed through the'openings 12, toward the face plate and so as to bring the block 11 in a vertical position. The beveled end, however, places the vertical line of the center 1 of the gravity outside of the lower end which will cause the block to fall outward when the cover is opened. It will pivot on the outer corner of the end which has been pushed by the flange 22 toward the cover, and so as to cause the shoulders 19 and 20 to clear, as shown in Fig. 5, and thus the block 11 will readily drop into locking position. The block 11 is provided with two oppositely extending cylindrical arms 23 located in the laterally extending portions of the shell 8 and located a short distance from the end 21 of the block 11. The flange 22 and the arms 23 hold the block in its blocking position.

hen the block 11 is raised it pivots on the lower corner of the end which is located comparatively some little distance from the cover and a sufficient distance to cause the shoulders 19 and 20 to engage. In

order, therefore, to unlock or unblock the door the cover 13 must be raised and held up and the block must not only be raised up but it must be picked up in order that the shoulders may not obstruct its insertion into the shell 8, whereupon the cover 13 may be dropped. This prevents the block from entering the shell by an upward jar of the car.

In order to secure the proper relation between the block and the flange so that the lower end of the block may be pushed forward and yet held when the block is in the blocking position, one or both of the mem bers may be provided with a recess, such as the recess 24 in the flange or the notch or recess 25 in the block.

Also a spring pressed pin 26 may be located in the shell in such a position that it will operate to throw or push the block 11 out when the door is opened.

I claim 1. In a freight car door blocking means, a shell located substantially within the side surface of the car, and a pivoted block located in the shell and positioned so as to pivot into the path of the sliding door of the freight car, a sliding plate for releasing the block and closing the shell.

2. In a freight car door blocking means, a shell located substantially within the side surface of the car, a pivoted block located in the shell and positioned so as to pivot into the path of the sliding door of the freight car, a cover for closing the shell, the cover and the shell having slots, a sealing tape for securing the cover and shell together to lock the block in its blocking position.

3. In a freight car door blocking means, a shell located substantially within the side surface of the car, a pivoted block located in the shell and positioned so as to pivot into the path of. the sliding door of the freight car, the shell and the block having shoulders, means for causing the shoulders to engage when the block is pivoted in one direction when the block enters the shell and to cause shoulders to pass without engagement when the block is pivoted in the other direction toward blocking position.

In testimony whereof I have hereunto signed my name to this specification.

JOHN F. MURPHY. 

